AP Macroeconomics, AP exams

Unit 6: Open Economy: International Trade and Finance

Unit 6 covers the balance of payments, exchange rates, and the links between currency markets and domestic output. The foreign exchange market graph is the last major model in the course and appears often on free-response questions. Chains from interest rates to capital flows to exchange rates to net exports are the unit's central reasoning pattern.

Position: 6 of 6 units
Topics covered: 6 topics in this guide

What is covered

Topics inside this unit.

These topics describe the scope students most often review for this part of AP Macroeconomics. Treat them as a study checklist rather than an exhaustive list of what a single exam form can sample.

The balance of payments: Current account and capital and financial account entries, and why the accounts offset one another.
Exchange rates: Appreciation and depreciation, floating and fixed regimes, and how exchange rates are quoted.
The foreign exchange market: Supply of and demand for a currency, determinants that shift each, and the resulting equilibrium exchange rate.
Policy effects on currency markets: How monetary and fiscal policy change interest rates, capital flows, and the value of a currency.
Exchange rates and net exports: How currency movements change export and import prices and feed back into aggregate demand.
Real interest rates and capital flows: Why relative real interest rates drive international investment and the demand for a currency.

Study tips

How to practice Open Economy.

Section-specific guidance that follows from how this material is usually tested.

Always label the foreign exchange graph with which currency is being priced and in what.
Rehearse the full chain from a policy change to capital flows to the exchange rate to net exports.
Practice questions linking two countries' currencies; the reciprocal relationship trips up many students.

Where this fits

Unit 6: Open Economy: International Trade and Finance is 6 of 6 units in the AP Macroeconomics guide. Use the full guide to balance it against everything else you have to review.

Back to the AP Macroeconomics guide Official exam information

Sample Open Economy questions

Practice questions, not yet expert-reviewed

Original practice questions written to the published framework for this section. No expert has reviewed them, and they are not taken from any official exam. Try each one before you open the answer.

Question 1Foundational
True or False: When a country's currency depreciates, its exports become cheaper for foreign buyers and imported goods become more expensive for its own residents.
1. ATrue
2. BFalse
Show answer
Answer: A. True
A depreciated currency buys less abroad, so foreign goods cost domestic residents more, while foreigners find that their own currency now buys more of this country's output. That combination is why depreciation tends to raise net exports and shift aggregate demand to the right.
Key insight: Weaker currency means cheaper exports and pricier imports, so depreciation is expansionary for the domestic economy.
Question 2Foundational
In the balance of payments, which account records a domestic resident's purchase of foreign stocks and bonds?
1. AThe financial account
2. BThe current account
3. CThe government budget
4. DThe money market
Show answer
Answer: A. The financial account
Purchases of foreign financial assets are cross-border investment flows and belong in the capital and financial account. The current account is the tempting distractor, but it records trade in goods and services along with income and transfer payments rather than asset purchases.
Key insight: The two accounts offset each other: a current account deficit is financed by a matching net inflow in the financial account.
Question 3Intermediate
Real interest rates in Country X rise well above those available abroad. What happens in the foreign exchange market for Country X's currency?
1. ADemand for the currency increases and it appreciates
2. BDemand for the currency decreases and it depreciates
3. CSupply of the currency increases and it appreciates
4. DNothing changes, because interest rates affect only domestic borrowing
Show answer
Answer: A. Demand for the currency increases and it appreciates
Foreign investors seeking the higher return must first buy Country X's currency to purchase its assets, which shifts currency demand to the right and raises its value. Saying nothing changes is the tempting distractor, but financial capital moves across borders in search of the highest real return, which is exactly what links interest rates to exchange rates.
Key insight: Relative real interest rates drive capital flows, and capital flows drive exchange rates.
Question 4Intermediate
American consumers sharply increase their purchases of imported goods. What happens in the foreign exchange market for the United States dollar?
1. AThe supply of dollars increases and the dollar depreciates
2. BThe demand for dollars increases and the dollar appreciates
3. CThe supply of dollars decreases and the dollar appreciates
4. DNothing happens, because imports are paid for in dollars
Show answer
Answer: A. The supply of dollars increases and the dollar depreciates
Buying foreign goods requires selling dollars to obtain foreign currency, which shifts the supply of dollars to the right and lowers the dollar's value. Increased demand for dollars is the tempting distractor, but demand for the dollar comes from foreigners buying American exports and assets, not from Americans buying imports.
Key insight: On the foreign exchange graph, ask who needs which currency: importers supply their own currency while exporters create demand for it.
Question 5Advanced
A large open economy adopts expansionary fiscal policy financed by borrowing, which pushes its real interest rate above world levels. What is the resulting effect on its currency and its net exports?
1. AThe currency appreciates and net exports fall
2. BThe currency depreciates and net exports rise
3. CThe currency appreciates and net exports rise
4. DThe currency depreciates and net exports fall
Show answer
Answer: A. The currency appreciates and net exports fall
Higher real interest rates attract foreign financial capital, which raises demand for the currency and appreciates it, making exports pricier abroad and imports cheaper at home so net exports decline. Appreciation with rising net exports is the tempting distractor, but a stronger currency always works against exports, which is why this channel partly offsets the fiscal expansion.
Key insight: Deficit spending is dampened twice in an open economy: crowding out reduces investment and currency appreciation reduces net exports.

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Unit 6: Open Economy: International Trade and Finance